W it nesses



(No Model.)

A. E. PARSONS. CONNECTION FOB. STEAM ENGINES.

No. 454,814. Patented June-23, 1891.

Fig 1.

IIIIIH I HHJIIII A/VlTNEE-EE QWF JM UNITED STATES PATENT- OFFICE.

AMBROSE EVERETT PARSONS, OF NEIV BERNE, NORTH CAROLINA, ASSIGNO R OFONE-HALF TO CHARLES R. F. EDIVARDS, OF SAME PLACE.

CONNECTION FOR STEAM-ENGINES.

' SPECIFICATION forming part of Letters Patent No. 454,814, dated June23, 1891.

Application filed July 31, 1890- Serial No. 360,466. (No model.) I

T aZZ whom it may concern:

Be it known that I, AMBROSE EVERETT PAR-' tions for Steam-Engines, ofwhich the following is a specification.

The object of this invention is to obviate the dead-centers in asinglecylinder engine; and it consists in employing, with a singlecylinder, a double crank-shaft with its cranks at a right angle and inattaching to the crosshead a pivoted rocker or beam and connecting theends of the said rocker to the crankpins by means of rods havinguniversal or knuckle joints.

In the further description of the said invention which follows referenceis made to the accompanying drawings, forming a part hereof, and inwhich Figure 1 is a partly-sectional side view of the elements of theengine above alluded to, and Fig. 2 an end View of the same.

Similar letters of reference indicate similar parts in both figures.

In the saidv drawings, A is a steam-cylinder, and B the piston-rod,which passes through a stuffing-box a.

O is a cross-head, into which the lower end of the piston-rod issecured. The ends of the cross-head are adapted to bear against suitableguides, which, together wit-h the frame of the engine which supportsthem, are not shown.

D is the rocker or beam pivoted to the cross- 3 5 head 0 by means of abolt 1). The ends of the rocker terminate in pins 0.

E is a double crank-shaft, the cranks of which are denoted by F and G.The rocker is directly over the shaft E and extends longitudinally ofit. In other words, in the vibration of the rocker its ends are alltimes over the shaft.

The crank-pins d and e are connected to the pins 0 of the rocker bymeans of rods H and I, and the boxes are of the universal-jointdescription in order that the rods may vibrate in different directions.Through the medium of the pivoted rocker one crank will help the otherover the dead-center, and any irregular- 5o ity in motion will be takenup by the vibrating rocker.

I claim as my invention In combination with a; steam-cylinder and ashaft having two cranks, a cross-head, a 5 5 rocker pivoted within thesaid cross-head, extending longitudinally of the said shaft, andconnecting-rods with ball-joints at both ends, which unite the saidcranks with the ends of the said rocker, substantially as and for thepurpose specified.

AMBROSE EVERETT PARSONS.

Witnesses;

JNo. T. MADDoX, DANL. FISHER.

